It took me some time to get used to Miniflux's expected usage pattern.
It's like Miniflux wants me to skim a lot of articles and read a few.
I start by opening the first article in Unread, then keep pressing 'l' to go to the next article ('h' to go to the previous one) and occasionally mark an article as unread by pressing 'm', if it's too long or I want to read it later.
It's a faster workflow compared to Tiny Tiny RSS. It's like the "inbox zero" approach for RSS feeds